3/7 * 7/9 = 3/9 = 1/3
5/8 * 1 13/15 * 2 2/7 = 2 2/3
1) 5/8 * 1 13/15 = 5/8 * 28/15 = 140/120 = 1 20/120 = 1 1/6
2) 1 1/6 * 2 2/7 = 7/6 * 16/7 = 16/6 = 2 4/6 = 2 2/3
3/7 * 7/9 = 3/9 = 1/3
5/8 * 1 13/15 * 2 2/7 = 2 2/3
1) 5/8 * 1 13/15 = 5/8 * 28/15 = 140/120 = 1 20/120 = 1 1/6
2) 1 1/6 * 2 2/7 = 7/6 * 16/7 = 16/6 = 2 4/6 = 2 2/3